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Russell H.
Russell H., Service Tech
Category: Camera and Video
Satisfied Customers: 10334
Experience:  8+ years of professional experience
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I have a D810 camera with a TC-20EII 2X teleconverter and an

Customer Question

I have a D810 camera with a TC-20EII 2X teleconverter and an AFS Nikkor 80-400mm 1:4.5;5.6G lense and at the 400mm setting it will not auto focus. How do I correct this?
Submitted: 9 months ago.
Category: Camera and Video
Expert:  Russell H. replied 9 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

If your Nikkor lens is the


AF-S NIKKOR 80-400mm f/4.5-5.6G ED VR

then with that teleconverter, it is listed as 'AF Not Possible' with a TC-20EII, on this page:

It is surprising, given this indication, that the lens Auto-Focuses in any setting at all.

But it appears that the limitation is owing to incompatibility, as listed.

(If this answers your question, please rate my answer, so that this case may be closed. Thanks.)

Customer: replied 9 months ago.
That did not solve my problem not much help.
Expert:  Russell H. replied 9 months ago.

You might want to try cleaning the contacts, on both the lens assembly and the camera lens mount, or the teleconverter if it has lens contacts, with a clean dry lint-free rag cloth, rubbing the contacts gently only, lest the coating on the contacts be rubbed off.